Perhaps you should try some spelling variations:
scale studien » scale studies, scale student, duale studien
filosofia la » filosofia da, filosofia le, filosofica da
quito scale » equity scale, auto scale
filosofia a » filosofia da, filosofia e, filosofia _
studien a » studien am, studien _, studien 3

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "quito scale studien a ((filosofia a) OR (filosofia la)) literatura".
• Adding a wildcard symbol may retrieve word variants: quito scale studien a ((filosofia a) OR (filosofia la)) literatura*.